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post #1 of 5 (permalink) Old 11-25-2012, 07:55 AM Thread Starter
Main Motorcycle: Triumph triples and fours
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Tickover stalling.

My new (03) sprint has developed what i think is a strange problem.
From cold or when warm she ticks over fine but if i rev the motor anything above 4000 ish the engine falls back and stops/stalls.
If i just gently blip the throttle it does not happen.Strangley i took her for a run today and had a quick nip up the motorway and as i came off the slip road and dropped down through the gears it felt as though it was going to stall again.This could be my imagination as the bikes new to be but i get the feeling it wants to stop.
Any advice would be welcome.
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post #2 of 5 (permalink) Old 11-25-2012, 09:14 AM
Main Motorcycle: 2003 Sprint ST
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I've experienced that problem with carbs. If the bike was carbureted, I'd say your main jets were clogged or the carbs were out if sync. Since you have EFI, could you have clogged injectors? Or could the throttle body be out of sync?

I haven't yet had a chance to figure out my own EFI, so I really don't know anything, just guessing here. Hope to hear someone with experience chime in.

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post #3 of 5 (permalink) Old 11-25-2012, 03:30 PM
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Maybe injector blockage? Try some injector cleaner in your fuel for a while.
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post #4 of 5 (permalink) Old 11-26-2012, 05:08 PM
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I am thinking your TPS is hanging up. Every once in a while, intermittantly, my bike was stalling on me, usually in city traffic, when I allowed the throttle to close. This wasn't something the bike ever did, so I knew something was wrong.
An easy way to check is to hook it up to TuneEcu, put it on the diagnostic screen, watch the TPS readout when you open the throttle, and let it snap closed. If it's hanging up, you will see it on the readout. It will be slow to return to 0.
Mine was hanging up, and I removed the o-ring which I felt wasn't needed, and then it worked fine. Oddly enough, about a year later, my TPS went dodgey, and I had to replace it altogether.


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post #5 of 5 (permalink) Old 11-26-2012, 05:28 PM Thread Starter
Main Motorcycle: Triumph triples and fours
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Other Motorcycle: Can only afford one!
Tickover stalling.

Thanks guys.I may have an idea that the previous owner passed on.He had a slight misfire/running problem and took the bike back to a Triumph dealer.They checked it out and advised him to add a splash of Redex every three tank fills.This cured the problem and kept it at bay.I have filled her up three times now including the day i bought her when the tank was low.Could be a combination of old crappy fuel and lack of use.I have now added a splash so will give her a good run before i start looking any further into the depths.

Last edited by markis42; 11-26-2012 at 06:28 PM.
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